The high pressure and high strain rate dynamic strength of Molybdenum (Mo) is experimentally and computationally investigated in the 3-20 GPa stress and 105-106 /s strain rate regime using the tamped Richtmyer-Meshkov instability method. Plate impact experiments are performed at Argonne National Laboratory’s Advanced Photon Source’s Dynamic Compression Sector (DCS), driving a planar shock front through a corrugated Mo-D2O or Mo-perfluorooctane (C8F18) interface, forcing the corrugation to invert and form a jet. The extent of the deformation (jet length, jet shape, etc.) is experimentally measured using X-ray phase contrast imaging at the DCS. Numerical simulations are performed using the Eulerian code CTH and calibrated against the experimental radiographs. Mo yield strength, Y, as a function of shock pressure, P, strain rate, ϵ ̇, and temperature, T, is determined for each impact experiment and presented.
Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia LLC, a wholly owned subsidiary of Honeywell International Inc. for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.
